Liver fatty acid-binding protein and obesity

Area of Science:

• Biochemistry
• Metabolic Syndrome
• Obesity Research

Background:

• Long-chain fatty acids (LCFAs) are essential but toxic at high levels, linked to metabolic syndrome.
• Fatty acid-binding proteins (FABPs) sequester LCFAs, preventing cellular toxicity.
• Liver-FABP (L-FABP) is highly expressed in liver, intestine, and kidney.

Purpose of the Study:

• To investigate the role of L-FABP in regulating fatty acid metabolism and preventing obesity.
• To determine the in vivo consequences of L-FABP deficiency on body weight and fat mass.

Main Methods:

• Utilized gene-ablated mice lacking L-FABP (L-FABP null mice).
• Assessed metabolic parameters including food consumption, body weight, and fat tissue mass.
• Administered control and high-fat diets to evaluate diet-induced obesity.

Main Results:

• L-FABP null mice exhibited age- and sex-dependent weight gain and increased fat mass on a standard diet.
• The obese phenotype was significantly exacerbated in L-FABP null mice fed a high-fat diet.
• In vitro studies confirmed L-FABP's role in hepatic LCFA uptake and metabolism.

Conclusions:

• L-FABP is critical for preventing the accumulation of LCFAs, thereby mitigating obesity.
• L-FABP deficiency promotes weight gain and fat accumulation, suggesting a protective role against diet- and age-induced obesity.